Pipe-wrench



(No Model.)

E. WRIGHT.

PIPE WRENCH.

Patented Sept. 17, 1895.

UNITED STATEs PATENT @Enron EDY/YARD WRIGHT, OF WORCESTER,MASSACHUSETTS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 546,443, datedSeptember 1'?, 1895. VApplication tiled February 9,1895. Serial ll'o.537,765- (No model.)

To @ZZ whom, t may con/cern: ing it centrally in position. The spacewithin Be it known that I, EDWARD WRIGHna citi` the guide-box of theslide-har is made of sunrizen of the United States, residing atVVorcescient width to afford aliinited degree of bacli- 55 ter, in thecounty of Worcester and State of ward and forward play between the barsA 5 Massachusetts, have invented a new and useand B, as at I, the partsswinging from the ro- .t'ul Pipe-.Vrencli, of which the following,tosette as a center, and a spring K is arranged gether with theaccompanying drawings, is a between the inner surface of the lips b andspecification sufficiently full, clear, and exact face of the bar A tonormally press the bars 6a to enable persons skilled in the art to whichtoward each other. Said spring is retained by ro this inventionappertains to make and use the a pin m or in other suitable manner. The

saine. bars are preferably of steel castings or drop- The object of mypresent invention is to forged, and the cheek-plates B2, which formprovide a strong, simple, and practically eflthe guide-box, areprimarily made outwardly 65 cient adjustable pipe-wrench that canbe1naninclined, as per dotted lines, Fig. 3, so that the 15 ufacturedwith economyand facility; and my bar A can be entered between the lipsb.

invention consists in a pipe-wrench in which Then these cheek-plates arebent or set inthe parts are made and combined in the peward by aid ofsuitable dies, bringing the culiar ina-nner hereinafter set forth.cheeks parallel with the sides of the bar A 7o In the drawings, Figure lis a side View of and closing the lips b over the angle of said zo thepipe-wrench constructed in accordance bar, as shown in full lines, Fig.3.

with my invention, with dotted lines indicat- The body portion of thebar B is best made ing the internal structure. Fig. 2 is a front thesaine width as the jaw B', thus giving anlview of the same. Fig. 3 is atransverse secplestrength to avoid bending orfracture when 75 tion atVline X X, and Fig. 4 is a transverse put to the severest strains in theuse of the z5 section at line Y Y. i wrench.

Referring to parts, A denotes the main bar, The jaw-faces are bothupwardly inclined, having upon its upper end the jaw A and at that ofthe jaw B being inclined to somewhat its lower end the handle A2. Uponthe back greater degree than the face of the jaw A. 8o of the bar thereare formed two projections a3 Their faces are serrated or provided with3o and a4, with an intervening space between oppoSitely-directed teeth,as usual in pipethem. The projection c3 is bifurcated or verwrenches.tically recessed to serve as a journal-bearing The operation of placingthe jaws upon the for the adjusting-screw. pipe swings back the top ofthe bar B, as in- 85 B indicates the slide-bar, having the outer dicatedin Fig. l. Then when the handle is 35 jaw B formed on its upper end andprovided swung around in the direction of the arrow at its lower portionwith cheek-plates B2, with the jaws, by the slight rolling actionafforded inwardly-overhanging lips b along their front by the space l,are caused to firmly grip and edges, that loosely embrace the main bar Aturn the pipe. The strain of the jaw B is go and form a guidebox for theadjustable jawsustained by tensile action through the screw 4o bar,inthe manner indicated. The lower end D drawing the rosette D against theprojecof the slide-bar B is chambered and intertion a5, and this issustained by a thrust acnally screw-threaded to receive theadjustingtion on the bar A from the jaw A. This conscrew D, which latteris provided with a rcstruction maires a very strong wrench, one 95sette-head D', that is disposed and loosely that can be operated withconvenient facility,

45 confined within the space between the pro` and which can bemanufactured with economy jection a3 and o4 upon the bar A, the neck ofand little labor. the screw being embraced by the bifurcated I claim asmyinvention herein to be secured projection ai and the screw centrallyretained by Letters Patentzoo by a pintle-stud F, fixed in theprojection a4, 1. The within described pipe-wrench, coin` 5o with itsend entering an axial recess formed prising the main bar, its upper endformed as in the rosette and there tting loosely, so as a jaw and itslower end a handle, and proto allow free action of the screw whileretainvided with projecting bearing portions upon its hack edge abovethe handle, the slide-har having lthe outer jaw at its -upperemL and:internally chamhered and threaded at yits lower endl, its lower bodyportion provided- `with lipped cheek-plates that forma guidebox looselyabout;k said main har, and the ad.- justing screw itsthxead tting thethreadiu said slide-bar, its neckembraced Aby the bifurcated bearingprojection on the main bar with its rosette head loosely con fined inthe space below said bearingysaid slide-bar and its jaw havingl alimited backward and foi`` f ward swing relative to the main bar, fromthe rosette head as a center, for k"fhe'purpose set forth.

Vil. In a pipe-wrench,the main' ybai'A having the jawA, the handle A2and the backward projections, @Bend a thereonfwith a recess between saidprojections; the slide-bar B formed with jaw B and cheekplates B2, thelatten loosely embracing said-mainbai', the adj ustf ing-screwllthreaded inio'said slide-bar, its neck journaled iu the projection a3and having the rosette-headdisposed.Within the `recess between theprojections, and lthe pimieengaging within au axial opening in said roffsetcehead,y and thespring disposed between lthe overhanging lips .onsaid cheek-plates and the front of said main bar, all combined for.operation substantially as and for thepur- 25 f stud-F xedin theprojection 0,4 with its end f

